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Unread 03-14-2009, 08:15 PM   #1
TomCombo
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1983 CJ7 
 
Join Date: Feb 2009
Location: Oswego, IL
Posts: 63
Brake light - Turn signal troubleshooting

I have been piecing together the wiring on my basketcase 83 CJ7. I have it put together, but the brake lights and turn signals aren't working right. When I step on the brake pedal, the brake lights don't come on. The tail lights and front grille marker lights work with the headlight switch, though. If I turn the key to the run position, and actuate the turn signal lever, the rear lights blink as they should, but the grille lights don't. If I then step on the brake pedal the rear lights work as they should (one side blinks the other side is constant) - grille lights still don't do anything. I took the column apart and pulled the turn signal switch partly out. It looks ok. If I slide the turn signal switch to just the right position, the bake lights work with the pedal.

Does this sound like a ground problem or a turn signal switch problem? The dash is gounded to the frame. I also have eng to frame, battery to engine, grille to frame, and tail lights to frame (its a glass tub). It acts goofy like a ground problem, but I think I have all the grounds, so maybe it is just the switch. What do you guys think??

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Unread 03-15-2009, 03:20 AM   #2
John Strenk
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1976 CJ5 
 
Join Date: Feb 2005
Location: Shalersville Ohio
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I think it's the switch.
Check this out:
http://www.cjoffroad.com/forums/topi...s=Turn,Signals
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Unread 03-15-2009, 05:35 AM   #3
Mike Romain
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1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
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The tail lights need two grounds, one for the case and one for that black wire. The running lights ground through the wire and the brake lights ground through the the fixture. Ground theft can happen so some things appear to work sort of... I soldered a wire right onto the backing plate of my rear fixtures for their ground tag on my 'glass tub.

The front fixtures also need a case ground. They are sneaky and use a special shoulder screw for the ground path so if you have replaced the screws with normal ones, they won't work right. Again I didn't mess around, I soldered a wire right to the back of the fixture.

Is your brake light switch plugged in?
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86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
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Unread 03-15-2009, 11:09 AM   #4
crusty75
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1975 CJ5 
 
Join Date: Oct 2004
Posts: 424
Had the same problem on the 75. I've got the older clamp on TS switch, and after a rebuild, and finding a cold solder joint in the switch, I thought I had it fixed. Nope. I wound up solving the problem the same way as Mike did.

Drove me nuts for a while...
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Unread 03-15-2009, 12:54 PM   #5
TomCombo
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1983 CJ7 
 
Join Date: Feb 2009
Location: Oswego, IL
Posts: 63
Thanks for the input guys. I will double check the grounds first. I have aftermarket 1950 Pontiac tail lights. They have one dual filliment bulb. Two wires and a tang on the bulb socket for the ground. So one wire for tail, one wire for brake/TS and I attached a ground wire to the tang.

Oh yeah, Mike, the brake light switch is connected. I used a test light and the brake switch is working. I checked the tail lights before installation by wiring directly to the battery.

I'll have to check John's link when I get to a PC. I can't view the pictues on this Blackberry.
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Unread 03-15-2009, 03:12 PM   #6
John Strenk
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Quote:
Originally Posted by TomCombo View Post
Thanks for the input guys. I will double check the grounds first. I have aftermarket 1950 Pontiac tail lights. They have one dual filliment bulb. Two wires and a tang on the bulb socket for the ground. So one wire for tail, one wire for brake/TS and I attached a ground wire to the tang.

Oh yeah, Mike, the brake light switch is connected. I used a test light and the brake switch is working. I checked the tail lights before installation by wiring directly to the battery.

I'll have to check John's link when I get to a PC. I can't view the pictues on this Blackberry.
I'd like to see tha tail lights.

Oh yeah., is there a better browser for the blackberry? I hate the one on mine also.
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Unread 03-17-2009, 09:24 PM   #7
TomCombo
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1983 CJ7 
 
Join Date: Feb 2009
Location: Oswego, IL
Posts: 63
Guys - I posted this a few days ago and thought I'd share the results....

The winner is John. The problem was the switch. I double checked the grounds and everything was good. So I was about to order a new TS switch online, but while I was at Autozone today, I asked if they had a TS switch. To my amazement they did. $25 or about $20 less than the 4WD, Quadratec, etc!!!!

I just finished installing it and all the lights function properly. Now I can drive it down the road! Can't wait till tomorrow!

PS - John, I will post pictures of the Pontiac taillights once I figue out how....photobucket or whatever. Thanks for the advice!
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